The **Bluetooth** module provides classic Bluetooth capabilities and Bluetooth Low Energy (BLE) scan and advertising.
> **NOTE**
> The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.
> The APIs provided by this module are no longer maintained since API version 9. You are advised to use [bluetoothManager](js-apis-bluetoothManager.md).
>
> - The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.
> - The APIs provided by this module are no longer maintained since API version 9. You are advised to use [bluetoothManager](js-apis-bluetoothManager.md).
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@@ -123,7 +124,7 @@ let state = bluetooth.getState();
getBtConnectionState(): ProfileConnectionState
Obtains the profile connection state of this Bluetooth device.
Obtains the local profile connection state.
> **NOTE**<br>
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.getBtConnectionState](js-apis-bluetoothManager.md#bluetoothmanagergetbtconnectionstate).
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@@ -214,9 +215,9 @@ let result = bluetooth.pairDevice("XX:XX:XX:XX:XX:XX");
Obtains the connection status of a specified profile.
> **NOTE**<br>
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.getProfileConnectionState](js-apis-bluetoothManager.md#bluetoothmanagergetprofileconnectionstate).
Subscribes to the characteristic write request events.
> **NOTE**<br>
> This API is supported since API version 7 and
> deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.on('characteristicWrite')](js-apis-bluetoothManager.md#oncharacteristicwrite).
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.on('characteristicWrite')](js-apis-bluetoothManager.md#oncharacteristicwrite).
| type | string | Yes | Event type. The value **descriptorWrite** indicates a descriptor write request event.|
| callback | Callback<[DescriptorWriteReq](#descriptorwritereq)> | Yes | Callback invoked to return a descriptor write request from the GATT client. |
| callback | Callback<[DescriptorWriteReq](#descriptorwritereq)> | Yes | Callback invoked to return a descriptor write request from the GATT client. |
**Return value**
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@@ -3198,7 +3198,7 @@ let deviceName = gattClient.getDeviceName().then((data) => {
Obtains the RSSI of the remote BLE device. This API uses an asynchronous callback to return the result. It can be used only after a connection is set up by calling [connect](#connect).
Obtains the received signal strength indication (RSSI) of the remote BLE device. This API uses an asynchronous callback to return the result. It can be used only after a connection is set up by calling [connect](#connect).
> **NOTE**<br>
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.getRssiValue](js-apis-bluetoothManager.md#getrssivalue).
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@@ -3553,7 +3553,7 @@ Defines the scan configuration parameters.
## ScanDuty<sup>(deprecated)</sup>
Enumerates the scan modes.
Enumerates the scan duty options.
> **NOTE**<br>
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.ScanDuty](js-apis-bluetoothManager.md#scanduty).
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@@ -3882,7 +3882,7 @@ Enumerates the A2DP playing states.
Enumerates Bluetooth profiles. API version 9 is added with **PROFILE_HID_HOST** and **PROFILE_PAN_NETWORK**.
Enumerates the Bluetooth profiles. API version 9 is added with **PROFILE_HID_HOST** and **PROFILE_PAN_NETWORK**.
> **NOTE**<br>
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.ProfileId](js-apis-bluetoothManager.md#profileid).
| [GattClientDevice](#gattclientdevice) | **GattClientDevice** instance created. Before using a method of the client, you must create a **GattClientDevice** instance.|
| [GattClientDevice](#gattclientdevice) | **GattClientDevice** instance created. Before using an API of the client, you must create a **GattClientDevice** instance.|
**Example**
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@@ -1714,7 +1714,7 @@ try {
## A2dpSourceProfile
Before using a method of **A2dpSourceProfile**, you need to create an instance of this class by using the **getProfile()** method.
Before using an API of **A2dpSourceProfile**, you need to create an instance of this class by using **getProfile()**.
### connect<a name="a2dp-connect"></a>
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@@ -1901,7 +1901,7 @@ try {
## HandsFreeAudioGatewayProfile
Before using a method of **HandsFreeAudioGatewayProfile**, you need to create an instance of this class by using the **getProfile()** method.
Before using an API of **HandsFreeAudioGatewayProfile**, you need to create an instance of this class by using **getProfile()**.
### connect<a name="hfp-connect"></a>
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@@ -1994,7 +1994,7 @@ Subscribes to the HFP connection state change events.
| boolean | Returns **true** if tethering is available over a Bluetooth PAN; return **false** otherwise.|
**Error codes**
For details about the error codes, see [Bluetooth Error Codes](../errorcodes/errorcode-bluetoothManager.md).
| ID| Error Message|
| -------- | ---------------------------- |
|2900001 | Service stopped. |
|2900003 | Bluetooth switch is off. |
|2900004 | Profile is not supported. |
|2900099 | Operation failed. |
**Example**
```js
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@@ -2358,7 +2347,7 @@ try {
## GattServer
Implements the Generic Attribute Profile (GATT) server. Before using an API of this class, you need to create a **GattServer** instance using the **createGattServer()** method.
Implements the Generic Attribute Profile (GATT) server. Before using an API of this class, you need to create a **GattServer** instance using **createGattServer()**.
### startAdvertising
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@@ -2860,7 +2849,7 @@ Subscribes to the descriptor read request events.
Subscribes to the BLE characteristic change events. The client can receive a notification from the server only after the **setNotifyCharacteristicChanged** API is called.
Subscribes to the BLE characteristic change events. The client can receive a notification from the server only after **setNotifyCharacteristicChanged** is called.
@@ -612,14 +630,14 @@ Unsubscribes from the data changes of this distributed data object.
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| type | string | Yes| Event type to unsubscribe from. The value is **change**, which indicates data changes.|
| type | string | Yes| Event type to unsubscribe from. The value is **change**, which indicates data changes.|
| callback | Callback<{sessionId:string,fields:Array<string>}> | No| Callback for data changes. If this parameter is not specified, all data change callbacks of this distributed data object will be unregistered.<br>**sessionId** indicates the session ID of the distributed data object.<br>**fields** indicates the changed attributes of the distributed data object.|
@@ -673,14 +691,14 @@ Unsubscribes from the status change of this distributed data object.
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| type | string | Yes| Event type to unsubscribe from. The value is **status**, which indicates the status change (online or offline) of the distributed data object.|
| type | string | Yes| Event type to unsubscribe from. The value is **status**, which indicates the status change (online or offline) of the distributed data object.|
| callback | Callback<{sessionId:string,deviceId:string,status:'online'\|'offline'}> | No| Callback for status changes. If this parameter is not specified, all status change callbacks of this distributed data object will be unregistered.<br>**sessionId** indicates the session ID of the distributed data object.<br>**deviceId** indicates the device ID of the distributed data object.<br>**status** indicates the object status, which can be online or offline.|
Synchronizes the KV store manually. For details about the synchronization modes of the distributed data service, see [Distributed Data Service Overview](../../database/database-mdds-overview.md).
> **NOTE**
> **NOTE**<br/>
>
> The value of **deviceIds** is obtained by [deviceManager.getTrustedDeviceListSync](js-apis-device-manager.md#gettrusteddevicelistsync). The APIs of the **deviceManager** module are system interfaces and available only to system applications.
Synchronizes the KV store manually. For details about the synchronization modes of the distributed data service, see [Distributed Data Service Overview](../../database/database-mdds-overview.md).
> **NOTE**
> **NOTE**<br/>
>
> The value of **deviceIds** is obtained by [deviceManager.getTrustedDeviceListSync](js-apis-device-manager.md#gettrusteddevicelistsync). The APIs of the **deviceManager** module are system interfaces and available only to system applications.
The volumeManager module provides APIs for volume and disk management, including obtaining volume information, mounting or unmounting volumes, partitioning disks, and formatting volumes.
The **volumeManager** module provides APIs for volume and disk management, including obtaining volume information, mounting or unmounting a volume, partitioning a disk, and formatting a volume.
> **NOTE**
>
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@@ -18,7 +18,7 @@ import volumemanager from "@ohos.file.volumeManager";
| callback | AsyncCallback<[Volume](#volume)[]> | Yes | Callback invoked to return information about all available volumes.|
**Example**
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@@ -68,7 +70,7 @@ Asynchronously obtains information about all available volumes. This API uses a
mount(volumeId: string): Promise<void>
Asynchronously mounts a volume. This API uses a promise to return the result.
Asynchronously mounts a volume. This API uses a promise to return the result. Currently, only the File Allocation Table (FAT), Extensible FAT (exFAT), and New Technology File System (NTFS) file systems are supported.
Asynchronously obtains the available space of the specified volume. This API uses a callback to return the result.
Asynchronously mounts a volume. This API uses an asynchronous callback to return the result. Currently, only the FAT, exFAT, and NTFS file systems are supported.
Asynchronously formats a volume. This API uses a promise to return the result.
Formats a volume. This API uses a promise to return the result. Currently, only the virtual file allocation table (VFAT) and exFAT file systems are supported. Only unmounted volumes can be formatted. After a volume is formatted, the UUID, mounting path, and description of the volume change.
Asynchronously formats a volume. This API uses a callback to return the result.
Formats a volume. This API uses an asynchronous callback to return the result. Currently, only the VFAT and exFAT file systems are supported. Only unmounted volumes can be formatted. After a volume is formatted, the UUID, mounting path, and description of the volume change.
Asynchronously partitions a disk. This API uses a promise to return the result.
Partitions a disk. This API uses a promise to return the result. The system supports access to multi-partition disks. Currently, this API can partition a disk into only one partition.
Asynchronously partitions a disk. This API uses a callback to return the result.
Asynchronously partitions a disk. This API uses a callback to return the result. The system supports access to multi-partition disks. Currently, this API can partition a disk into only one partition.
| diskId | string | Yes| No| ID of the disk to which the volume belongs. |
| id | string | Yes| No| Volume ID, in the vol-{Primary device ID}-{Secondary device ID} format. The primary device IDs identify devices of different types. The secondary device IDs identify different devices of the same type. The volume IDs vary depending on the card insertion sequence. |
| uuid | string | Yes| No| Volume UUID, which uniquely identifies a volume irrespective of the card insertion sequence. However, the UUID of a volume will change after the volume is formatted. |
| diskId | string | Yes| No| ID of the disk to which the volume belongs. A disk can have one or more volumes. The disk ID is in the disk-{Primary device ID}-{Secondary device ID} format, which is similar to the volume ID. |
| description | string | Yes| No| Description of the volume. |
| removable | boolean | Yes| No| Whether the volume is a removable storage device.|
| state | number | Yes| No| Volume state. |
| path | string | Yes| No| Mount address of the volume. |
| removable | boolean | Yes| No| Whether the volume can be removed. Currently, only removable storage devices are supported.|
| state | number | Yes| No| Volume status.<br>**0**: The volume is unmounted.<br>**1**: The volume is being checked.<br>**2**: The volume is mounted.<br>**3**: The volume is being ejected. |
| path | string | Yes| No| Path of the volume mounted. Generally, the path is **/mnt/external/{uuid}**. |
| options | [HuksOptions](#huksoptions) | Yes | Tags required for generating the key. The algorithm, key purpose, and key length are mandatory.|
| callback | AsyncCallback\<void> | Yes | Callback invoked to return the result. If the operation fails, **err** is returned.|
| callback | AsyncCallback\<void> | Yes | Callback invoked to return the result. If the operation is successful, no **err** value is returned; otherwise, an error code is returned.|
**Example**
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@@ -186,7 +186,7 @@ Deletes a key. This API uses an asynchronous callback to return the result.
| callback | AsyncCallback\<void> | Yes | Callback invoked to return the result. If the operation fails, **err** is returned.|
| callback | AsyncCallback\<void> | Yes | Callback invoked to return the result. If the operation is successful, no **err** value is returned; otherwise, an error code is returned.|
**Example**
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@@ -289,7 +289,7 @@ Imports a key in plaintext. This API uses an asynchronous callback to return the
| options | [HuksOptions](#huksoptions) | Yes | Tags required for the import and key to import. The algorithm, key purpose, and key length are mandatory.|
| callback | AsyncCallback\<void> | Yes | Callback invoked to return the result. If the operation fails, **err** is returned.|
| callback | AsyncCallback\<void> | Yes | Callback invoked to return the result. If the operation is successful, no **err** value is returned; otherwise, an error code is returned.|
**Example**
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@@ -426,7 +426,7 @@ Obtains the certificate used to verify a key. This API uses an asynchronous call
| keyAlias | string | Yes | Alias of the key. The certificate to be obtained stores the key. |
| options | [HuksOptions](#huksoptions) | Yes | Parameters and data required for obtaining the certificate. |
| callback | AsyncCallback<[HuksReturnResult](#huksreturnresult9)> | Yes | Callback invoked to return the result. If the operation fails, **err** is returned.|
| callback | AsyncCallback<[HuksReturnResult](#huksreturnresult9)> | Yes | Callback invoked to return the result. If the operation is successful, no **err** value is returned; otherwise, an error code is returned.|
**Example**
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@@ -553,7 +553,7 @@ Obtains the certificate used to verify a key. This API uses a promise to return
| Promise<[HuksReturnResult](#huksreturnresult9)> | Promise used to return the result. If the operation fails, **err** is returned.|
| Promise<[HuksReturnResult](#huksreturnresult9)> | Promise used to return the result. If the operation is successful, no **err** value is returned; otherwise, an error code is returned.|
**Example**
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@@ -676,7 +676,7 @@ Imports a wrapped key. This API uses an asynchronous callback to return the resu
| keyAlias | string | Yes | Alias of the wrapped key to import. |
| wrappingKeyAlias | string | Yes | Alias of the data used to unwrap the key imported. |
| options | [HuksOptions](#huksoptions) | Yes | Tags required for the import and the wrapped key to import. The algorithm, key purpose, and key length are mandatory.|
| callback | AsyncCallback\<void> | Yes | Callback invoked to return the result. If the operation fails, **err** is returned.|
| callback | AsyncCallback\<void> | Yes | Callback invoked to return the result. If the operation is successful, no **err** value is returned; otherwise, an error code is returned.|
**Example**
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@@ -926,7 +926,7 @@ Exports a key. This API uses an asynchronous callback to return the result.
| callback | AsyncCallback<[HuksReturnResult](#huksreturnresult9)> | Yes | Callback invoked to return the result. If the operation is successful, **HUKS_SUCCESS** is returned and **outData** contains the public key exported. If the operation fails, an error code is returned.|
| callback | AsyncCallback<[HuksReturnResult](#huksreturnresult9)> | Yes | Callback invoked to return the result. If the operation is successful, no **err** value is returned; otherwise, an error code is returned. **outData** contains the public key exported.|
**Example**
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@@ -1005,7 +1005,7 @@ Obtains key properties. This API uses an asynchronous callback to return the res
| callback | AsyncCallback<[HuksReturnResult](#huksreturnresult9)> | Yes | Callback invoked to return the result. If the operation is successful, **errorCode** is **HUKS_SUCCESS**; otherwise, an error code is returned.|
| callback | AsyncCallback<[HuksReturnResult](#huksreturnresult9)> | Yes | Callback invoked to return the result. If the operation is successful, no **err** value is returned and **properties** contains the parameters required for generating the key. If the operation fails, an error code is returned. |
**Example**
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@@ -1084,7 +1084,7 @@ Checks whether a key exists. This API uses an asynchronous callback to return th
| callback | AsyncCallback\<boolean> | Yes | Callback invoked to return the result. **TRUE** means that the key exists; **FALSE** means the opposite.|
| callback | AsyncCallback\<boolean> | Yes | Callback invoked to return the result. The value **TRUE** means that the key exists; **FALSE** means the opposite.|
**Example**
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@@ -1161,9 +1161,9 @@ Initializes the data for a key operation. This API uses an asynchronous callback
| keyAlias | string | Yes | Alias of the target key. |
| options | [HuksOptions](#huksoptions) | Yes | Parameters used for initialization. |
| callback | AsyncCallback\<[HuksSessionHandle](#hukssessionhandle9)> | Yes | Callback invoked to return the handle obtained through the initialization operation.|
| keyAlias | string | Yes | Alias of the key involved in the **initSession** operation. |
| options | [HuksOptions](#huksoptions) | Yes | Parameter set used for the **initSession** operation. |
| callback | AsyncCallback\<[HuksSessionHandle](#hukssessionhandle9)> | Yes | Callback invoked to return a session handle for subsequent operations.|
## huks.initSession<sup>9+</sup>
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@@ -1177,14 +1177,14 @@ Initializes the data for a key operation. This API uses a promise to return the
Updates the key operation data by segment. This API uses a promise to return the result. **huks.initSession**, **huks.updateSession**, and **huks.finishSession** must be used together.
Updates the key operation by segment. This API uses a promise to return the result. **huks.initSession**, **huks.updateSession**, and **huks.finishSession** must be used together.
| HUKS_TAG_USER_AUTH_TYPE | HuksTagType.HUKS_TAG_TYPE_UINT \| 304 | User authentication type. For details, see [HuksUserAuthType](#huksuserauthtype9). This parameter must be set together with [HuksAuthAccessType](#huksauthaccesstype9). You can set a maximum of two user authentication types at a time. For example, if **HuksAuthAccessType** is **HKS_SECURE_ACCESS_INVALID_NEW_BIO_ENROLL**, you can set two of **HKS_USER_AUTH_TYPE_FACE**, **HKS_USER_AUTH_TYPE_FINGERPRINT**, and **HKS_USER_AUTH_TYPE_FACE\**.| HKS_USER_AUTH_TYPE_FINGERPRINT |
| HUKS_TAG_KEY_AUTH_ACCESS_TYPE<sup>9+</sup>| HuksTagType.HUKS_TAG_TYPE_UINT \| 307 | Access control type. For details, see [HuksAuthAccessType](#huksauthaccesstype9). This parameter must be set together with [HuksUserAuthType](#huksuserauthtype9).|
| HUKS_TAG_KEY_SECURE_SIGN_TYPE<sup>9+</sup>| HuksTagType.HUKS_TAG_TYPE_UINT \| 308 | Signature type of the key generated or imported.|
| HUKS_TAG_CHALLENGE_TYPE<sup>9+</sup>| HuksTagType.HUKS_TAG_TYPE_UINT \| 309 | Type of the challenge generated for a key. For details, see [HuksChallengeType](#hukschallengetype9).|
| HUKS_TAG_CHALLENGE_POS<sup>9+</sup>| HuksTagType.HUKS_TAG_TYPE_UINT \| 310 | Position of the 8-byte valid value in a custom challenge. For details, see [HuksChallengePosition](#hukschallengeposition9).|
| HUKS_TAG_ATTESTATION_CHALLENGE | HuksTagType.HUKS_TAG_TYPE_BYTES \| 501 | Challenge value used in the attestation. |
| HUKS_TAG_ATTESTATION_APPLICATION_ID | HuksTagType.HUKS_TAG_TYPE_BYTES \| 502 | Application ID used in the attestation. |
| HUKS_TAG_ATTESTATION_ID_BRAND | HuksTagType.HUKS_TAG_TYPE_BYTES \| 503 | Brand of the device. |
| HUKS_TAG_ATTESTATION_ID_DEVICE | HuksTagType.HUKS_TAG_TYPE_BYTES \| 504 | ID of the device. |
| HUKS_TAG_ATTESTATION_ID_PRODUCT | HuksTagType.HUKS_TAG_TYPE_BYTES \| 505 | Product name of the device. |
| HUKS_TAG_ATTESTATION_ID_SERIAL | HuksTagType.HUKS_TAG_TYPE_BYTES \| 506 | SN of the device. |
| HUKS_TAG_ATTESTATION_ID_IMEI | HuksTagType.HUKS_TAG_TYPE_BYTES \| 507 | International mobile equipment identity (IMEI) of the device. |
| HUKS_TAG_ATTESTATION_ID_MEID | HuksTagType.HUKS_TAG_TYPE_BYTES \| 508 | Mobile equipment identity (MEID) of the device. |
| HUKS_TAG_ATTESTATION_ID_MANUFACTURER | HuksTagType.HUKS_TAG_TYPE_BYTES \| 509 | Manufacturer of the device. |
| HUKS_TAG_USER_AUTH_TYPE | HuksTagType.HUKS_TAG_TYPE_UINT \| 304 | User authentication type. For details, see [HuksUserAuthType](#huksuserauthtype9). This parameter must be set together with [HuksAuthAccessType](#huksauthaccesstype9). You can set a maximum of two user authentication types at a time. For example, if **HuksAuthAccessType** is **HKS_SECURE_ACCESS_INVALID_NEW_BIO_ENROLL**, you can set two of **HKS_USER_AUTH_TYPE_FACE**, **HKS_USER_AUTH_TYPE_FINGERPRINT**, and **HKS_USER_AUTH_TYPE_FACE**. |
| HUKS_TAG_KEY_AUTH_ACCESS_TYPE<sup>9+</sup> | HuksTagType.HUKS_TAG_TYPE_UINT \| 307 | Access control type. For details, see [HuksAuthAccessType](#huksauthaccesstype9). This parameter must be set together with [HuksUserAuthType](#huksuserauthtype9). |
| HUKS_TAG_KEY_SECURE_SIGN_TYPE<sup>9+</sup> | HuksTagType.HUKS_TAG_TYPE_UINT \| 308 | Signature type of the key generated or imported. |
| HUKS_TAG_CHALLENGE_TYPE<sup>9+</sup> | HuksTagType.HUKS_TAG_TYPE_UINT \| 309 | Type of the challenge generated for a key. For details, see [HuksChallengeType](#hukschallengetype9). |
| HUKS_TAG_CHALLENGE_POS<sup>9+</sup> | HuksTagType.HUKS_TAG_TYPE_UINT \| 310 | Position of the 8-byte valid value in a custom challenge. For details, see [HuksChallengePosition](#hukschallengeposition9). |
| HUKS_TAG_ATTESTATION_CHALLENGE | HuksTagType.HUKS_TAG_TYPE_BYTES \| 501 | Challenge value used in the attestation. |
| HUKS_TAG_ATTESTATION_APPLICATION_ID | HuksTagType.HUKS_TAG_TYPE_BYTES \| 502 | Application ID used in the attestation. |
| HUKS_TAG_ATTESTATION_ID_BRAND | HuksTagType.HUKS_TAG_TYPE_BYTES \| 503 | Brand of the device. |
| HUKS_TAG_ATTESTATION_ID_DEVICE | HuksTagType.HUKS_TAG_TYPE_BYTES \| 504 | ID of the device. |
| HUKS_TAG_ATTESTATION_ID_PRODUCT | HuksTagType.HUKS_TAG_TYPE_BYTES \| 505 | Product name of the device. |
| HUKS_TAG_ATTESTATION_ID_SERIAL | HuksTagType.HUKS_TAG_TYPE_BYTES \| 506 | SN of the device. |
| HUKS_TAG_ATTESTATION_ID_IMEI | HuksTagType.HUKS_TAG_TYPE_BYTES \| 507 | International mobile equipment identity (IMEI) of the device. |
| HUKS_TAG_ATTESTATION_ID_MEID | HuksTagType.HUKS_TAG_TYPE_BYTES \| 508 | Mobile equipment identity (MEID) of the device. |
| HUKS_TAG_ATTESTATION_ID_MANUFACTURER | HuksTagType.HUKS_TAG_TYPE_BYTES \| 509 | Manufacturer of the device. |
| callback | AsyncCallback\<[HuksResult](#huksresultdeprecated)> | Yes | Callback invoked to return the result. If the operation is successful, **HUKS_SUCCESS** is returned and **outData** contains the public key exported. If the operation fails, an error code is returned.|
| callback | AsyncCallback\<[HuksResult](#huksresultdeprecated)> | Yes | Callback invoked to return the result. If the operation is successful, **HUKS_SUCCESS** is returned and **outData** contains the public key exported. If the operation fails, an error code is returned.|
**Example**
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@@ -2411,7 +2411,7 @@ Checks whether a key exists. This API uses an asynchronous callback to return th
| callback | AsyncCallback\<boolean> | Yes | Callback invoked to return the result. **TRUE** means that the key exists; **FALSE** means the opposite.|
| callback | AsyncCallback\<boolean> | Yes | Callback invoked to return the result. The value **TRUE** means that the key exists; **FALSE** means the opposite.|
**Example**
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@@ -2473,8 +2473,8 @@ Initializes the data for a key operation. This API uses an asynchronous callback
| keyAlias | string | Yes | Alias of the target key.|
| options | [HuksOptions](#huksoptions) | Yes | Parameters used for initialization.|
| callback | AsyncCallback\<[HuksHandle](#hukshandledeprecated)> | Yes | Callback invoked to return the handle obtained through the initialization operation.|
| options | [HuksOptions](#huksoptions) | Yes | Parameter set used for the **init** operation.|
| callback | AsyncCallback\<[HuksHandle](#hukshandledeprecated)> | Yes | Callback invoked to return a session handle for subsequent operations.|
## huks.init<sup>(deprecated)</sup>
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@@ -2491,13 +2491,13 @@ Initializes the data for a key operation. This API uses a promise to return the
The **userIAM.userAuth** module provides user authentication capabilities in identity authentication scenarios, such as device unlocking, payment, and app login.
> **NOTE**<br>
> **NOTE**
>
> The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.
